Repeated Welcome, License Agreement, etc

According to no pattern that I can discern, I find when starting up Open Office that occasionally I am again shown the Welcome procedure, and have to follow through all the steps of License Agreement, Name, Update preferences, Registration preferences. When OO finally starts, however, things like Options are remembered, as are Recent Documents. I cannot link this reversion to any previous activity, number of uses, or anything. I do not alter or delete anything under Data/settings/ or anything else. (But I always say No when invited to register: could it be this, a kind of nag?) Does anybody else share this phenomenon and/or know the reason for it? Thank you.